Assume a change at the source of sound reduces the wavelength of a sound wave in air by a factor of 3. (i) What happens to its

Question

Assume a change at the source of sound reduces the wavelength of a sound wave in air by a factor of 3.

(i) What happens to its frequency? It increases by a factor of 9. It increases by a factor of 3. It is unchanged. It decreases by a factor of 3. It changes by an unpredictable factor.
(ii) What happens to its speed?

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Sapo 4 days 2021-07-21T04:52:04+00:00 1 Answers 0 views 0

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    2021-07-21T04:53:30+00:00

    Explanation:

    The speed of a wave is given by :

    v=f\lambda ……(1)

    (i) Here, the wavelength of a sound wave in air reduces by a factor of 3. Equation (1) becomes :

    \lambda=\dfrac{v}{f}

    Wavelength and frequency are inversely proportional to each other. So, if wavelength of a sound wave in air reduces by a factor of 3, then the frequency will increases by a factor of 3.

    (ii) It remains the same.

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